QuickLuaTour翻译流水账(11-20)

-- Example 11  -- Numbers.
-- Multiple assignment showing different number format.
-- Two dots (..) are used to concatenate strings (or a
-- string and a number).

a,b,c,d,e = 1, 1.123. 1E9, -123, .0008
print("a="..a, "b="..b, "c="..c, "d="..d, "e="..e)


------ Output ------

a=1       b=1.123 c=1000000000     d=-123   e=0.0008


-- 例子 11  -- 数字
-- 以下多个赋值语句说明了不同的数字格式。
-- 两个点号被用来连接字符串（也可连接一个字符串和一个数字）


-- Example 12   -- More Output.
-- More writing output.

print "Hello from Lua!"
print("Hello from Lua!")


------ Output ------

Hello from Lua!
Hello from Lua!


-- 例子 12  -- 更多的输出


-- Example 13  -- More Output.
-- io.write writes to stdout but without new line.

io.write("Hello from Lua!")
io.write("Hello from Lua!")

-- Use an empty print to write a single new line.
print()


------ Output -------

Hello from Lua!Hello from Lua!


-- 例子13  -- 更多的输出
-- io.write可以写控制台，但不会换行

-- print()可以打印一个空行


-- Example 14  -- Tables.
-- Simple table creation.

a={} -- {} creates an empty table
b={1,2,3} -- creates a table containing numbers 1,2,3
c={"a","b","c"} -- creates a table containing strings a,b,c
print(a,b,c)  -- tables don't print directly, we'll get back to this!!


------- Output -------

table:009EB468 table:009EB558 table:009EB580


-- 例子 14  -- 表
-- 简单的创建表

a={} -- {}创建一个空表
b={1,2,3} -- 创建一个包含数字1，2，3的表
c={"a","b","c"} -- 创建一个包含串a,b,c的表
print(a,b,c) -- 不能直接的打印表，我们会回来搞定这个问题！！


-- Example 15  -- More Tables.
-- Associate index style.

address={} -- empty address
address.Street="Wyman Street"
address.StreetNumber=360
address.AptNumber="2a"
address.City="Watertown"
address.State="Vermont"
address.Country="USA"

print(address.StreetNumber, address["AptNumber"])


------ Output ------

360     2a


-- 例子 15  -- 表续集
-- 关联，索引风格


-- Example 16  -- if statement.
-- Simple if.

a=1
if a == 1 then
    print(a is one)
end

------ Output -------

a is one


-- 例子 16 -- if语句
-- 简单的if


-- Example 17  -- if else statement.

b="happy"
if b=="sad" then
    print("b is sad")
else
    print("b is not sad") 
end

------ Output ------

b is not sad

-- 例子 17  -- if else 语句


-- Example 18  -- if elseif else statement

c=3
if c==1 then
    print("c is 1")
elseif c==2 then
    print("c is 2")
else
    print("c isn't 1 or 2, c is "..tostring(c))
end

------ Output -------

c isn't 1 or 2, c is 3


-- Example 19   -- Conditional assignment.
-- value = test and x or y

a=1
b=(a==1) and "one" or "not one"
print(b)

-- is equivalent to
a=1
if a==1 then
    b = "one"
else
    b= "not one"
end
print(b)

------ Output ------

one
one

-- 例子 19  -- 条件赋值


-- Example 20  -- while statement

a=1
while a~=5 do -- Lua uses ~= to mean not equal
    a=a+1
    io.write(a.." ")
end

------ Output -------

2 3 4 5

-- 例子20 -- while语句
-- Lua使用~=来表示不等于